A028493 - OEIS

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A028493

a(n+1) = 3a(n) - (6-n)^2.

16, 12, 11, 17, 42, 122, 365, 1095, 3284, 9848, 29535, 88589, 265742, 797190, 2391521, 7174499, 21523416, 64570148, 193710323, 581130825, 1743392306, 5230176722, 15690529941, 47071589567, 141214768412 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	REFERENCES	`Seen in a newspaper quiz.`
	MAPLE	`(3^n + (5-n)*(6-n) + 1)/2;`
	CROSSREFS	`Sequence in context: A008665 A076823 A070551 * A070534 A070577 A184752` `Adjacent sequences: A028490 A028491 A028492 * A028494 A028495 A028496`
	KEYWORD	`nonn,easy`
	AUTHOR	`Mark Orr (mjo(AT)cns.ed.ac.uk)`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.